Hollow Metal Steel Frames
MDI Supply.com carries a full line of commercial quality HM doors and frames. Our frames are standard at 16 gauge A40 galv steel. Fire labeling available is 45 min, 90 min and 3-hours (some restrictions do apply). Typical MDI HM frames come with a double rabbet profile x 2 inch integral trim. In addition, MDI steel knock-down frames are standard with a compression wall anchor, sometimes referred to as a "pressure-fit anchor" or a "tension screw anchor." Fire labeled frames by MDI come standard with a surface closer reinforcement in the head of the frame.
Standard frame fixed throat sizes available are: from (in inches) 3 3/4, 4 7/8, 6 1/8, & 7 3/4. Standard adjustable throat sizes are available from (in inches): ADJ-47 (4 1/2-7 3/4 throat) and ADJ-711 (7 1/2-12 1/4 throat).
If you don't see a frame you need please contact our customer service department at 888.634.3667 for a custom tailored quotation on your project. Custom engineered doors and frames are available.